N2 Group View

The Group View provides you, on a group by group basis, with a fast overview of the top 3 CPU load generators. These lists are automatically refreshed and keep you up-to-date on traffic, i/o, load and CPU usage.
The Group View is triggered by the 'icon-view' button:

N2 List View

The List View provides a grouped overview with more detail. It autorefreshes at regular intervals and is sorted by CPU load. You can see stats like network traffic, latency, load and CPU usage at a glance.

The blue bars provide the CPU usage at a given point in time and give you a quick insight into which nodes might be about to run into trouble.
The List View is triggered by the 'list-view' button:

N2 Details - Info

The Info tab shows you the details for a single node. It shows the status, CPU usage, CPU load, free RAM, free swap, the number of processes that are currently running, disk i/o measured in blocks per second, traffic information in Kbit/s, the network roundtrip-time, the amount of packet loss (measured by the receiver daemon), etc.

N2 Details - Details

The Details Tabs show you the active mounts, Open TCP Ports and the processess currently running on the server. This view enables you to identify rogue scripts or to pinpoint CPU and memory hoggers.

If you use this view in a shared hosting environment with suPHP or a similarly configured PHP-FastCGI setup, you can even identify the Unix users that triggered the hogging apache processes.

N2 Details - Graphics

One of the most informative tabs is the graphics tab. Here you can see the usage of different resources displayed over time. You can click below the horizontal time-axis to move all elements of the n2 details view to the corresponding time.

This screen helps to understand load and RAM requirements, shows trends in network usage over time, and it enables you to predict when you need to upgrade components in the server, or start your nightly backups earlier.

N2 Details - Report

One of the big changes in our 1.0.1 release is the Lua-based analysis framework wich we have implemented to analyse the data gathered with n2.

With the analysed data n2 is now capable to give you hints for optimizing the VPS or server in understandable, human readable form. It could give you hints for optimizing Disk I/O, Apache configs etc.